Toro 31598N - Removing and Installing a Blade; Inspecting and Sharpening the Cutter Blade(S)

bladeisbentandmustbereplaced;refertoRemoving
andInstallingaBlade(page61).
RemovingandInstallinga
Blade
Replacethebladeifithitsasolidobject,ifitisoutofbalance,
orifitisbent.AlwaysusegenuineTororeplacementblades
tobesureofsafetyandoptimumperformance.Neveruse
replacementbladesmadebyothermanufacturersbecause
theycouldbedangerous.
1.Raisethemowerdecktothehighestposition.
2.Performthepremaintenanceprocedure;referto
PreparingtheMachineforMaintenance(page38).
3.Blockthemowerdecktopreventitfromaccidentally
falling.
4.Grasptheendofthebladeusingaragorthickly
paddedgloveandremovethebladebolt,anti-scalpcup,
andbladefromthespindleshaft(Figure99).
Figure99
1.Bladebolt2.Anti-scalpcup
5.Installtheblade,anti-scalpcup,andbladebolt.
6.Torquethebladeboltto115to149N·m(85to110
ft-lb).
Important:Thecurvedpartoftheblademust
pointtowardtheinsideofthemowerdeckto
ensurepropercutting.
Note:Afterstrikingaforeignobject,torqueallthe
spindle-pulleynutsto176to203N·m(130to150ft-lb)
andthebladeboltsto115to149N·m(85to110ft-lb).
InspectingandSharpeningthe
CutterBlade(s)
ServiceInterval:Aftertherst10hours
Every50hours
Beforeeachuseordaily
Youmustconsider2areasofthebladewhencheckingand
servicingit:thesailandthecuttingedge.Bothcuttingedges
andthesail,whichistheturned-upportionoppositeofthe
cuttingedge,contributetoagoodqualityofcut.Thesail
isimportantbecauseitliftsthegrassupstraight,thereby
producinganevencut.However,thesailgraduallywears
downduringoperation,whichisnormal.Asthesailwears
down,thequalityofcutdegradessomewhat,althoughthe
cuttingedgesaresharp.Thecuttingedgeoftheblademust
besharpsothatthegrassiscut,nottorn.Adullcutting
edgeisevidentwhenthetipsofthegrassappearbrownand
shredded.Sharpenthecuttingedgestocorrectthiscondition.
1.Positionthemachineonalevelsurface,raisethe
mowerdeck,engagetheparkingbrake,putthetraction
pedalinNEUTRAL,ensurethatthePTOswitchisin
theOFFposition,shutofftheengine,andremovethe
ignitionkey.
2.Examinethecuttingendsofthebladecarefully
(especiallywheretheatandcurvedpartsoftheblade
meet)asshowninFigure100.
Note:Sincesandandabrasivematerialcanwearaway
themetalthatconnectstheatandcurvedpartsofthe
blade,checkthebladebeforeusingthemower.Ifyou
noticewear,replacetheblade(Figure100).
Figure100
1.Cuttingedge3.Wear/slotforming
2.Curvedarea4.Crack
3.Examinethecuttingedgesofalloftheblades.
4.Sharpenthecuttingedgesiftheyaredullornicked
(Figure101).
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